feat: replace v04 usage by v1 in sidecar#2156
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What does this PR do?
Wires the sidecar so SDKs (PHP first) can send V1 msgpack payloads. Adds the FFI entry points, tarpc methods, blocking/sender wrappers, and server handlers — symmetric to the existing
send_trace_v04_*chain.When the sidecar receives V1 bytes, it decodes them through
msgpack_decoder::v1(added in #2174), can inspect the payload, and re-encodes as V1 on the way to the agent's/v1.0/tracesendpoint.Motivation
APMSP-2813 : enable the sidecar V1-native path. PHP keeps computing its stats SDK-side via the SHM concentrator, so this PR only touches the trace transport pipeline.
Additional Notes
Files reviewers should focus on (sidecar-specific only — the rest comes from the decoder PR):
datadog-sidecar-ffi/src/lib.rs—ddog_sidecar_send_trace_v1_{shm,bytes}FFI exportsdatadog-sidecar/src/service/sidecar_interface.rs— tarpc trait methodssend_trace_v1_{shm,bytes}datadog-sidecar/src/service/sender.rs—TransportSender::send_trace_v1_{shm,bytes}datadog-sidecar/src/service/blocking.rs— blocking wrappersdatadog-sidecar/src/service/sidecar_server.rs— tarpc handlers + the internalsend_trace_v1helper (factored through a sharedsend_trace(... TraceEncoding))